US3985708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric reaction products of thiodiethanol and diphenols
Assignee: Wyeth Holdings LLC
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Filing: 1974-09-18
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Granted: 1976-10-12
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Expires: 1994-09-18
Abstract
Abstract A vulcanizable elastomer composition is provided which comprises a copolymer represented by the formula: H -- -- OG -- --.sub.x OH wherein -- -- OG -- -- comprises randomly alternating structural units (I), (II), and optionally, (III) -- -- oc.sub.2 h.sub.4 sc.sub.2 h.sub.4 -- -- (i) -- -- or -- -- (ii) -- -- or' -- -- (iii) wherein R represents the residue remaining on removal of two phenolic hydroxyl groups from a diphenolic compound and R' represents the residue remaining on removal of two hydroxyl groups from an aliphatic diol; said copolymer characterized in that the ratio of structural units (I) to structural units (II), or optionally, to the total of structural units (II) and (III), is not less than 1:1, and further characterized in that up to about 10 mole percent, based on total number of structural units [OG] of structural units (III), when present in said copolymer, contain external unsaturation having an allylic hydron atom; and x is an integer sufficient to provide a molecular weight of at least about 8000.
Inventors
- 👤 Eugene Yue Chieh Chang
- 👤 Robert Saxon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:09
CPC Classifications
C; C08; C08L; C08L71/00; C08G; C08G65/00; C08G65/34; C08G65/38; C08G65/40; C08G65/4006; C08G2650/00; C08G2650/62; C08G2650/64
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
165 words
A vulcanizable elastomer composition comprising a copolymer represented by the formula: H -- OG --.sub.x OH wherein -- OG -- comprises randomly distributed structural units of (I) and (II) taken alone or optionally with (III) -- oc.sub.2 h.sub.4 sc.sub.2 h.sub.4 -- (i) -- or -- (ii) -- or' -- (iii) wherein R represents the residue remaining on removal of two phenolic hydroxyl groups from a dihydric phenolic compound and R' represents the residue remaining on removal of two hydroxyl groups from an aliphatic diol; said copolymer characterized in that the ratio of structural units (I) to structural units (II), or optionally, to the total of structural units (II) and (III), is not less than 1:1, and further characterized in that up to about 10 mole percent, based on total number of structural units [OG] of structural units (III), in said copolymer, contain external unsaturation having an allylic hydrogen atom; and x is an integer sufficient to provide a molecular weight of at least about 8000.
Claim 2
Dependent Claim
165 words
A vulcanizable elastomer composition comprising a copolymer represented by the formula: H -- OG --.sub.x OH wherein -- OG -- comprises randomly distributed structural units of (I) and (II) taken alone or optionally with (III) -- oc.sub.2 h.sub.4 sc.sub.2 h.sub.4 -- (i) -- or -- (ii) -- or' -- (iii) wherein R represents the residue remaining on removal of two phenolic hydroxyl groups from a dihydric phenolic compound and R' represents the residue remaining on removal of two hydroxyl groups from an aliphatic diol; said copolymer characterized in that the ratio of structural units (I) to structural units (II), or optionally, to the total of structural units (II) and (III), is not less than 1:1, and further characterized in that up to about 10 mole percent, based on total number of structural units [OG] of structural units (III), in said copolymer, contain external unsaturation having an allylic hydrogen atom; and x is an integer sufficient to provide a molecular weight of at least about 8000.
Claim 3
Dependent Claim
69 words
The composition according to claim 1 wherein the dihydric phenolic compound is a member selected from the group consisting of bisphenolic having the formula: ##SPC2## wherein R is the same or different and represents hydrogen, alkyl or taken together with the carbon atom combine to form a cycloalkylene bridge and polymers of said bisphenols with dibasic acids in which the terminal groups of said polymers are substantially phenolic residues.
Claim 4
Dependent Claim
11 words
The composition according to claim 2 wherein the bisphenol is isopropylidenebisphenol.
Claim 5
Dependent Claim
34 words
The composition according to claim 1 wherein the dihydric phenolic is of the formula: ##SPC3## and polymers of said compounds with dibasic acids wherein the terminal groups of said polymers are substantially phenolic residues.
Claim 6
Dependent Claim
12 words
The composition according to claim 4 wherein the phenolic compound is hydroquinone.
Claim 7
Dependent Claim
12 words
The composition according to claim 4 wherein the phenolic compound is resorcinol.
Claim 8
Dependent Claim
19 words
The composition according to claim 1 wherein the copolymer consists only of randomly alternating structural units (I) and (II).
Claim 9
Dependent Claim
41 words
The composition according to claim 7 wherein the diphenolic compound is a bisphenol having the formula: ##SPC4## wherein R is the same or different and represents hydrogen, alkyl or taken together with the carbon atom combine to form a cycloalkylene bridge.
Claim 10
Dependent Claim
11 words
The composition according to claim 8 wherein the bisphenol is isopropylidenebisphenol.
Claim 11
Dependent Claim
42 words
The composition according to claim 1 wherein from about 1 to 10 mole percent, based on total structural units [OG], of the structural units (III) in the copolymer are derived from an aliphatic diol containing external unsaturation having an allylic hydrogen atom.
Claim 12
Dependent Claim
9 words
An elastomer prepared from the composition of claim 1.
Claim 13
Dependent Claim
9 words
An elastomer prepared from the composition of claim 7.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-12 | 1980-04-12 | 1980-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-12 | 1984-04-12 | 1984-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-12 | 1988-04-12 | 1988-10-12 | $7700.00 | Window Closed / Lapsed |